import auth from '@/plugins/auth'
import router, { constantRoutes, dynamicRoutes } from '@/router'
import { getRouters } from '@/api/menu'
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView'
import InnerLink from '@/layout/components/InnerLink'

const permission = {
  state: {
    routes: [],
    addRoutes: [],
    defaultRoutes: [],
    topbarRouters: [],
    sidebarRouters: []
  },
  mutations: {
    SET_ROUTES: (state, routes) => {
      state.addRoutes = routes
      state.routes = constantRoutes.concat(routes)
    },
    SET_DEFAULT_ROUTES: (state, routes) => {
      state.defaultRoutes = constantRoutes.concat(routes)
    },
    SET_TOPBAR_ROUTES: (state, routes) => {
      state.topbarRouters = routes
    },
    SET_SIDEBAR_ROUTERS: (state, routes) => {
      state.sidebarRouters = routes
    },
  },
  actions: {
    // 生成路由
    GenerateRoutes({ commit }) {
      return new Promise(resolve => {
        // 向后端请求路由数据
        getRouters().then(resDatas => {
          let res ={
            "msg": "操作成功",
            "code": 200,
            'data': [
              {
                "name": "Statistics",
                "path": "/statistics",
                "hidden": false,
                "redirect": "noRedirect",
                "component": "Layout",
                "alwaysShow": true,
                "meta": {
                  "title": "数据分析",
                  "icon": "chart",
                  "noCache": false,
                  "link": null
                },
                "children": [
                  {
                    "name": "Data",
                    "path": "data",
                    "hidden": false,
                    "component": "statistics/data/index",
                    "meta": {
                      "title": "获取企业车辆统计",
                      "icon": "chart",
                      "noCache": false,
                      "link": null
                    }
                  }
                ]
              },
              {
                "name": "Organization",
                "path": "/organization",
                "hidden": false,
                "redirect": "noRedirect",
                "component": "Layout",
                "alwaysShow": true,
                "meta": {
                  "title": "组织管理",
                  "icon": "peoples",
                  "noCache": false,
                  "link": null
                },
                "children": [
                  {
                    "name": "ResidentEnterprise",
                    "path": "residentEnterprise",
                    "hidden": false,
                    "component": "organization/residentEnterprise/index",
                    "meta": {
                      "title": "入驻企业管理",
                      "icon": "#",
                      "noCache": false,
                      "link": null
                    }
                  },
                  {
                    "name": "TransportCompany",
                    "path": "transportCompany",
                    "hidden": false,
                    "component": "organization/transportCompany/index",
                    "meta": {
                      "title": "运输公司管理",
                      "icon": "#",
                      "noCache": false,
                      "link": null
                    }
                  },
                ]
              },
            ]
          }
          const sdata = JSON.parse(JSON.stringify(res.data))
          const rdata = JSON.parse(JSON.stringify(res.data))
          const sidebarRoutes = filterAsyncRouter(sdata)
          const rewriteRoutes = filterAsyncRouter(rdata, false, true)
          const asyncRoutes = filterDynamicRoutes(dynamicRoutes);
          rewriteRoutes.push({ path: '*', redirect: '/404', hidden: true })
          /**
           * 动态设置首页路径
           * 通过后台返回的菜单  获取第一个菜单路由作为重定向地址
           */
          let homePath = '/'
          if(rewriteRoutes[0].children && rewriteRoutes[0].children.length) {
            homePath = rewriteRoutes[0].path + '/' + rewriteRoutes[0].children[0].path
          }else {
            homePath = rewriteRoutes[0].path
          }
          rewriteRoutes.push({ path: '/', redirect: homePath, hidden: true })
          console.log('rewriteRoutes', rewriteRoutes)
          router.addRoutes(asyncRoutes);
          commit('SET_ROUTES', rewriteRoutes)
          commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
          commit('SET_DEFAULT_ROUTES', sidebarRoutes)
          commit('SET_TOPBAR_ROUTES', sidebarRoutes)
          resolve(rewriteRoutes)
        })
      })
    }
  }
}

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
  return asyncRouterMap.filter(route => {
    if (type && route.children) {
      route.children = filterChildren(route.children)
    }
    if (route.component) {
      // Layout ParentView 组件特殊处理
      if (route.component === 'Layout') {
        route.component = Layout
      } else if (route.component === 'ParentView') {
        route.component = ParentView
      } else if (route.component === 'InnerLink') {
        route.component = InnerLink
      } else {
        route.component = loadView(route.component)
      }
    }
    if (route.children != null && route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children, route, type)
    } else {
      delete route['children']
      delete route['redirect']
    }
    return true
  })
}

function filterChildren(childrenMap, lastRouter = false) {
  var children = []
  childrenMap.forEach((el, index) => {
    if (el.children && el.children.length) {
      if (el.component === 'ParentView' && !lastRouter) {
        el.children.forEach(c => {
          c.path = el.path + '/' + c.path
          if (c.children && c.children.length) {
            children = children.concat(filterChildren(c.children, c))
            return
          }
          children.push(c)
        })
        return
      }
    }
    if (lastRouter) {
      el.path = lastRouter.path + '/' + el.path
    }
    children = children.concat(el)
  })
  return children
}

// 动态路由遍历，验证是否具备权限
export function filterDynamicRoutes(routes) {
  const res = []
  routes.forEach(route => {
    if (route.permissions) {
      if (auth.hasPermiOr(route.permissions)) {
        res.push(route)
      }
    } else if (route.roles) {
      if (auth.hasRoleOr(route.roles)) {
        res.push(route)
      }
    }
  })
  return res
}

export const loadView = (view) => {
  if (process.env.NODE_ENV === 'development') {
    return (resolve) => require([`@/views/${view}`], resolve)
  } else {
    // 使用 import 实现生产环境的路由懒加载
    //return () => import(`@/views/${view}`)
    return (resolve) => require([`@/views/${view}`], resolve);
  }
}

export default permission
